Error messages for extending a specific type

Author: prateekgoel

src/compiler/checker.ts

@@ -5831,7 +5831,7 @@ namespace ts {
                                 }
                             }
                             else {
-                                error(node, Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
+                                error(node, Diagnostics.An_interface_can_only_extend_an_object_or_intersection_type_with_statically_known_members);
                             }
                         }
                     }
@@ -25979,7 +25979,7 @@ namespace ts {
                                 }
                             }
                             else {
-                                error(typeRefNode, Diagnostics.A_class_may_only_implement_another_class_or_interface);
+                                error(typeRefNode, Diagnostics.A_class_can_only_implement_an_object_or_intersection_type_with_statically_known_members);
                             }
                         }
                     }

src/compiler/diagnosticMessages.json

@@ -1056,7 +1056,7 @@
         "category": "Error",
         "code": 2311
     },
-    "An interface may only extend a class or another interface.": {
+    "An interface can only extend an object or intersection type with statically known members.": {
         "category": "Error",
         "code": 2312
     },
@@ -1484,7 +1484,7 @@
         "category": "Error",
         "code": 2420
     },
-    "A class may only implement another class or interface.": {
+    "A class can only implement an object or intersection type with statically known members.": {
         "category": "Error",
         "code": 2422
     },